feat(lsp): allow function rename

[kobyhallx]

Description

Problem*

Resolves

Rename function Symbol with LSP #4192

Summary*

Allows to rename function symbol.

Additional Context

Documentation*

Check one:

• [x] No documentation needed.
• [ ] Documentation included in this PR.
• [ ] [Exceptional Case] Documentation to be submitted in a separate PR.

PR Checklist*

• [x] I have tested the changes locally.
• [x] I have formatted the changes with Prettier and/or cargo fmt on default settings.